Liquid circulating device



LIQUID CIRCULATING DEV ICE Filed Aug. 8, 1956 Patented June 6, 1939 1 40 a LIQUID CIRCULATING DEVICE Curtis C. vGoons, North Canton, Ohio, assignor to The Hoover Company, North Canton; Ohio, a corporation of Ohio c 1 .Application August s, 1936, Serial No. 94,937"

7 ,Claims. (01. 103-53).

This invention relates to fluid circulating devices and more particularly' to devices adapted to lift a liquid a small distance and which are adapted to be hermetically sealed within a closed 5 system suchas a continuous absorption refrigerating system.

It is known to circulate fluids in a hermetically sealed system by means of an electromagnetically vibrated disc or fln. An example-of a'fin for circulating gas'in a sealed system is disclosed in copending application of'Daigers Serial No.'21,920 filed May 1'7, 1935, now Patent No. 2,152,243. An electromagnetically operated diaphragm for circulating gas in a similar system is disclosed in the *co-pending application to Curtis C. Coons. Serial 'No. 24,675 filed June 3, 1935, now Patent No.

It is an object of the present invention to provide means somewhat similar to the arrangement shown in the above mentioned co-pending applications which are adapted to circulateliquids or lift liquids a slight distance in a hermetically sealed system. Such pumps may be used to cir culate absorption liquid between the boiler and the absorber of a continuous absorption refrigerating system or elsewhere in systems requiring that a liquid be lifted only a short distance or against a slight pressure.

- It is another object of the invention to provide novel-means for circulating a'liquid. I Itis still another object of' the invention to provide a novel, electromagnetically operated pump for circulating liquid. I Other objects and advantages reside in certain novel features of the arrangement and construction of parts as will be apparent from the following description taken in connection with the accompanying drawing in which? Figure 1 is a vertical cross-sectional viewof a .liquid circulator constructed in acordance with the present invention and illustrating one em? bodiment thereof. 7

Figure 2 is a'vertic'al cross sectional view of a modified form of liquid circulator constructed in accordance with 'theprinciples of the present invention and Figure 3 is a transverse cross sectional view of the circulator shown in Figure 2, the view being taken on the line 3-3 thereof.

- Referring to the drawing in detail and first to the embodiment of the invention illustrated in Figure 1,'it will be seen that the liquid pump is there illustrated as consisting of a closed casing which may be hermetically sealed and which II consists of a cylindrical cup shaped casing ll provided with a lid or head piece H! which may be bolted or otherwise firmly secured thereto. As shown by the bolt l3 the lid may be bolted to the cup shaped casing H but if a hermetically sealed unit is desired welding or other sealing means 5 may also be employed.

Located in the bottom of the cup shaped casing II is an electromagnet Id. The core l5 of this magnet may be firmly secured to the bottom of the cup II by means of a weld as illustrated atv [6. The bottom of-the cup I l or at least a portion thereof adjacent the electromagnetic pole [5 should be of non-magnetic material. A spool H is mounted upon the outside portion of the core and is wound with insulated wire in accordance with known practice, the insulated wire being shown at l8.

A disc or diaphragm I9 is mounted within the casing II with its central portion above the pole 15 of the electromagnet. For securing the diaphragm I9 in position, the screw and spacing rings 2| may be employed. The diaphragm 19 may be providedwitha number of holes as shown at 22 toaid in permitting liquid to pass from beneath the diaphragm to the upper surface thereof.

The liquid inlet to the casing II is shown at 23 and the arrangement should be such that the liquid level in the lower part of the casing should be slightly above the level of the diaphragm l9.

Mounted in the upper portion of the casing II is a catching pan or liquid receiving element 24 which is annular in shape and which has a central flange opening 25 located immediately above therpole piece 15 ofthe electromagnet and the center of the diaphragm l9. Secured to the top of the casing H on; the under side of the head piece I2 is a concave deflecting member 26 which is adapted to deflect liquid thrown upwardly by the diaphragm l9 and cause it to fall upon the catch basin 24. The outlet to the pump is shown at 40 and it will be seen that this is some distance above the inlet pipe 23, the difference in height being the distance that the pump lifts the liquid.

The operation of the device shown in Figure 1 results from the energizing of the coil l8 of the electromagnet M with alternating current or with pulsating direct current. In either case the electromagnet will cause the diaphragm l9 to vibrate. Vibrating liquid will be thrown upwardly against the deflecting member 26 and fall down upon the catch basin 24 at the higher level. The diaphragm IS in approaching the pole piece 15 of the electromagnet should be so positioned that the liquid will be forced upwardly through the small holes 22 therein. The spray of liquid leaves the central part of the disc in a conically shaped column or spray which spreads out, umbrella like, as it rises. Passing through the flanged hole 25 in the catch basin 24, the liquid is either deflected by the member 26 or falls directly upon the catch basin 24 Without hitting the deflecting member. While the deflecting member 26 improves the operation of the system its use is not absolutely essential. The under side of the deflecting member 26 may be grooved radially...to aid in causing the liquid to be retained upon its surface, although this is not showninth'e drawmg.

pumps situated one above the other, a liquid could be elevated to any desired height.

The arrangement of Figure 2 is somewhat similar to that of the arrangement of Figure 1 except that a leaf spring or fin is used to throw ..wise hermetically sealed to thecasing by means of the weld IS. A coil 18 is employed to energize the electromagnet.

In the arrangement of Figures 2 and 3 the vibrating fin is illustrated at 32 and is mounted upon the casing by means of the bolt 33 and the spacing. ring 34, the free end of the fin being located above the pole piece I5 of the electromagnet. It may be provided with a number of holes as shown at 35, if desired. A catch basin 36 is mounted in the upper part of the casing 21 and is provided with a flanged opening 31 above the free end of the vibrating fin. 1

As the fin is vibratedup and down by, means of. the electromagnet l4, liquid isthrown from the free end thereof through the opening 31 and falls upon the catch basin 36 so that itmay flow away through the discharge 3| of the pump. Due to the natural curvature of the cylinder 21' no deflecting member like. that shown at 26 is necessary.

While only a few embodiments of the invention have been shown and described herein,;-it is obvious that various changes may be made inthe arrangement and construction of parts without departingfrom the spirit of the invention or the scope of the annexed claims:

I claim:

1. A liquid pump adapted for lifting liquid a small distance in a hermetically closed-system, said pump having an electromagnet, a movable element adapted to be vibrated by said electromagnet, means for causing liquid to be pumped to contact said movable element and be thrown thereby to a higher level and liquid catching Obviously by the use of a series of such disc.

by said member.

means located above said movable element and adapted to catch the liquid thrown thereby.

2. A liquid pump adapted for lifting liquid a small distance in a hermetically closed system, said pump having an electromagnet, a movable element adapted to be vibrated by said electromagnet, means for causing liquid to be pumped to contact said movable element and be thrown thereby to a higher. level and liquid catching means located above said movable element and adapted to catch the liquid thrown thereby, said movable element having holes therein through which the liquid may pass.

3. A liquid pump adapted for lifting liquid a small distance in a hermetically closed system, said pump having an electromagnet, a movable element, adapted to be vibrated by said electromagnet, means for causing liquid to be pumped to contact said movable element and be thrown thereby to a higher level and liquid catching means located above said movable element and adapted to catch the liquid thrown thereby, said movable element comprising a disc disposed in a horizontal position with its center substantially above the core of said velectromagnet.

4. A liquid pump adapted for lifting liquid a small distance in a hermetically closed system, said pump having an electromagnet, a movable elementv adapted to be vibrated by said electromagnet, means for causing liquid to be pumped to contact said movable element and be thrown thereby to a higher level andliquid catching means located above said movable element and adapted to catch the liquid thrown thereby, said movable element comprising a flexible blade or fin fixed at one end and having a movable end disposed near said electromagnet. 7

5. A liquid pump, comprising a'rec'eptaclefor liquid an electromagnet, a movable member adapted to be vibrated by said electromagnet to throwliquid from said receptacle, said movable higher level.

7. A liquid pump comprising, a receptacle for liquid, an electromagnet, a movable "member adapted to be vibrated by said electromagnet, being normally positionedabove the liquid-level in said receptacle and adapted to raise liquid from said receptacle, said member being so constructed as to allow liquid to pass from one side thereof to the other and means for catching liquid raised CURTIS C. COONS;

. 5,4,5 comprising a casing having 

